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1. Increase the use of phosphorus and potassium fertilizers to promote the lignification of seedlings. Every month from November to the beginning of November, fertilize with 0 3% potassium dihydrogen phosphate and spray three times. Or use plant ash for 4 to 5 lbs per mu and apply them twice in succession. The nursery will stop applying nitrogen fertilizer after autumn.
2. Boron is sprayed outside the root to improve cold resistance. Every 10 days starting from November, a 50% borax solution is sprayed or mixed with potassium dihydrogen phosphate. Spray three times.
3, winter protection. The seedlings with weak cold resistance can be buried in the soil for winter, and the precious seedlings can be used in antifreeze greenhouses (greenhouses). Alpine nurseries can be built wind barriers, that is, in the wind surface hanging pine wood branches to withstand the cold wind. A layer of straw or thatch can also be kept warm.
4, irrigation antifreeze. On the eve of the frost, diving in the nursery can make the soil temperature no lower than 0°C, so that the seedlings will not freeze.
5, smoke and cold. In particularly cold weather, two to three smoke stacks can be installed around the nursery. Light up when the temperature drops to 0°C and keep the smoke until sunrise.
Forest fruit seedlings antifreeze measures
The cold damage of the forest fruit seedlings is caused by the cold winter weather. Freezing damage to seedlings has a great influence on the quality of seedlings. Some of the seedlings were frozen and the whole plant was dead. Some of the tops of the seedlings were freeze-dried, affecting the survival and growth of the fruit in the following year. Especially in the summer and autumn drought weather, the growth of seedlings was hindered, the seedlings were thin, and the ability to resist cold was reduced. Therefore, in order to improve the antifreeze ability of seedlings, assist antifreeze measures, and strengthen the management of seedlings to facilitate safe wintering of seedlings. The specific measures are as follows: